Comment 71 for bug 1581088

tompotts-

looking at your output, it looks like wheel emulation is still set to false:

Evdev Wheel Emulation (286): 0

I don't know what your trying to get it to do, but for me, my trackball works the way I want it to when I turn on the wheel emulation (set it to 1).

Based on the output you posted, you could try:

xinput --set-prop 11 286 1

which would turn on the wheel emulation